No there is no key,
There is a lever on your left when you proceed the opening (look careful it's a skeleton haed with a stick sticking out of it).
If youre lucky you will find some lockpicks but you can buy them off people later in the game.
You already have identify on level one but you have to wait a couple of levels before you can take it to level 2... <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />.
Hope this ansers your questions <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />.
By the way welcome to the forum <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" /> i'm new to!